Side wall construction



Filed Sept. 15, 1927' 2 Sheets-Sheet 1 Zwen/ J May 2, 1933. J. s. BENNETT SIDE WALL CONSTRUCTION Filed Sept, 15, 1927 2 Sheets-Sheet 2 Fatenteol May 2 193lotenant ENG'KH'EERHG GIBIEPAIW, @F @F PEIFNEYELVAETM PEILAD%PI3LIA, PENNSYLVANIA, A CQEPQEATIQN SLIDE WALL CQNSTR'UCTIQH a Application filed eptemher 115, 31997. I Seriallto. 219,?(35.

My invention relates to furnaces, and it has for one obgect the provision of simple and ethcient means, whereby that portion of the furnace Wall, which directly engages the fuel be& may be maintained at a teinperature preventing the adherence of clinker i'orniations thereto,

.A more specific object of my inventionis to provicle a fluid-heeled protective structure adjacent to one edge of a stoker con1- prising parts which are readily renewable in the event oi the damaging of the earner- Another object ofrny invention is to provirle, in connection with an inclined stolrer, an

'elonga'teu fluid-cooled side-wall construction having a width suficient to prevent the top 0:? the fuel beol from coming" in contact with the turnace lining and inclined at'an angle approximatel equal to that the stolrer. Experience has shown that such panel construction is not only easy to install but it also requires only a amount of material, inasmuch as that portion only of the furnace wall is protected which is unrnediately adjacent tothe fuel heal. More over, the use of a relatively narrow protec tive panel permits the elimination of costly bends anol complex constructions heretofore necessary when furnace openings were clesiredl in the protecteu portions of the furnace walls.

A. further object of my invention is to provide a furnace, wherein a fluid-cooled protective panel extends between the front and rear furnace walls at an angle approximately equal to the inclination of the grate surface of an inclinefi Stoker, the protective panel incluuing a cooling pipe which is connected into the boiler system of the "furnace.

Uther objects and applications of my invention, as well as details of construction and operation, whereby my invention may be practisei, will be apparent more fully hereinafter, when taken in connection with the accompanying specifications, claims and drawings, wherein,

Fig. 1 is a side elevational View, partiallyin vertical section, of a furnace emboolying my invention,

1 Fig. 2 is an enlarged. detail vertical sec- Referring to Fig. i, an inclined, multiple retort automatic Stoker l of the unclerteed type extends rearwardly from a fiurnace opening 21in a front wall 3 to a main su porting beam A, rear eni 5 of the sto er is spacecl from an adjacent rear wall 6 of the furnace so as to proviole an ash pocket The stoire'r l in y comprise a plurality of series of inclined t 8 and a corresponding plurality of ser cs oi retorts alternating therewith, only one s ries or"; each, how ever, being shown. A sulhcient number of series of retorts 9 anel 8 is provided to extend across the wiclth ot the furnace, hetween or linings illthereof. A l fuel bed may he built up lace provided by the inclined stoker l ancl slowly moved toward the ash; poclret 7 by means series oi: pushers 12, which are actuateri mechanism 13,,iorrning no part which the pushers 12 are contained may receive fuel from a hopper l4; positioned on the outside of the furnace. V

Various constructions have been heretotore proposed for the protection of that portion of the "furnace side walls which is alirectly subjected to thewear an(l deteriora tion incident to the movement of the fuel bed. Such constructions in general comprise a plurality oipipes extendin vertically the full iengtl'i oi the furnace side wall. EX- perience has shown, however, that this is a very undesirable arrangement. in the event that a clean-out door, as shown at 15 in Fig. l, is desired, it is necessary to resort to complicated bends immediately adjacent to the door, resulting in a very complex structure at this point. Moreover, such large installations are very costly and exceedingly dificult to install and repair. W

These undesirable results are overcome in my invention by the provision of a fluidhooled panel structure 16 having a width suficient only to prevent the fuel bed from coming into direct contact with the brick work of the furnace wall, and inclined at an angle approximately equal to that of the stoker 1 or the tuyere line thereof.

For reasons as will presently appear, a recess 17 is provided in the furnace wall 11 having an inclination approximately equal to that of the tuyere line or grate surface, and positioned so that a lower edge 18 thereof is I below the heated portion of the fuel bed and in direct contact with the relatively cool coal passing into the furnace from the hopper 14, as shown in Fig. 1. The width of the recess 17 is only such that an upper edge or side wall19 thereof is just above the top of the fuel bed. The recess 17 may be extended across the side wallll from the front wall 3 to the rear wall 6.

In accordance with my invention, the elongated fluid-cooled construction 16, is positioned in the recess 17 with an outer exposed side 21 in alignment with an inner side of the furnace wall 11. The panel structure 16, therefore, constitutes a part of the furnace wall lining and is of a width suflicient to protect the brickwork of the wall 11 from direct contact with the moving fuel bed and the wall above the fuel bed from a blow torch action of the flame. Byreason of the relatively narrow width of the protective panel 16, the cost thereof is a minimum and the problem of installation is very greatly simplified. In addition, by reason of the relatively narrow width and inclination of the panel 16, the clean-out door 15 does not cause any undesirable complications in the construction or installation of said panel.

Considering the elongated protective panel 16 in greater detail, a plurality of inclined pipes 22 extend from an upper front header 23 to a lower rear headerv 24. These pipes are positioned in spaced relation and in a common vertical plane between an innerside 25 of the side wall 11 and a side 26 of the inclined recess 17. Protection is afiorded the pipes 22 against the direct heat of the furnace by means of a plurality of blocks 27 of cast iron or other refractory material, which are disposed in side-by-side and superposed relation, forming respectively a plurality of vertical rows 28 and inclined rows 29. Upper and lower sides 31 and 32 of each of the blocks 27 are inclined at an angle corresponding to that of the stoker 1, while opposite front and rear sides 33 and 34 are positioned vertically. An advantagev of thus forming the blocks 27 is that the end blocks 27 as well as the intermediate blocks may be of one size.

An'innerside 35 of each block is recessed so as to partially embrace the circuinference of an adjacent pipe 22, and it may be releasably secured in this position by a pair of bolts 36 and 37, which extend from a vertically extending angle plate 38 to a threaded boring in the innerside 35 of the block 27. The plate 38 is thus clamped against an adjacent side of the pipe 22 by heads 39 of bolts 36 and 37, thereby rigidly securing together the pipe 22, the block 27 and the angle plate 38. Since the angle plate 38 extends vertically, each block in a vertical row may be rigidly secured to an adjacent pipe 22. A bulging outwardly of the structure 16 with res ect to the recess 17 may be prevented by a p urality of anchor structures 41, of which only three are shown. Each anchor 41 comprises a pair of spaced rods 42, which extend from a clamping plate 43 mounted on an outer side 44 of the furnace wall 11 to the angle plate 38. It is noted that while a certain portion of the weight of the panel structure 16 is carried by the anchors 41, the major portion of the load is supported on the ledge or shoulder portion 18 of the inclined recess 17.

Should the protective panel 16 be applied to a party wall rather than a furnace side wall, as shown in the drawings, then the rods 42 may be suitably anchored in position as shown in dot-and-dash lines in Fig. 2. Under certain circumstances it may be desirable to remove the blocks 27 from the inside of the furnace rather than from the outside, inasmuch as the latter method necessitates the removal of a portion of the furnace wall 11. This desired result may be effected merely by causing a boring 46 in which the bolt 36 is contained to extend entirely through ithe block 27 and providing an enlarged countersunk portion 47 in the inner end thereof. The bolt 36 is then replaced by a bolt 48, which is so positioned that a threaded portion 49 is supported by the vertical angle plate 38, while a head 51 is positioned in the countersunk recess 47. The countersunk recess 47 of the boring 46 may now be filled with cement 53 in order that a smooth surface may be presented to the fuel bed.

Cooling fluid may be supplied to the parallel rows of pipes 22, so as to maintain the blocks 27 at a safe working temperature, by connecting the lower header 24 to a boiler system 54, of which a drum 55 only is shown. This connection may be effected by means of a pipe 56. The upper outer header 23 is similarly connected to the boiler system 54 by means of a pipe 57. The remaining furnaoe wall 11, which is positioned opposite to the one shown in the drawings, may be similarly provided with an elongated narrow protective panel structure and connected to the boiler system 54, but in order to simplify the drawings, this has not been shown.

The construction shown in Fig. 3 is distinguishable overthat in Figs. 1 and 2 chiefly in the employment of refractory blocks 58 in top and bottom rows 61 and 62, respectively, wherein exposed sides 63 thereof are horizontally positioned. Thus the panel is provided with longitudinal step-like edges 64 incense the appended claims or as are demanded by the prior art.

I claim:

1. In a furnace, the combination with a stoker, of a side wall having a longitudinal recess substantially paralleling the stoker grate, a cooling system including a series of pipes located in said recess, a set of refractory heat-conducting blocks secured to said pipes and neatly filling the said recess to form'a narrow panel constituting an abutment for the fuel bed, and means anchoring said pipes in the side wall and preventing outward bulging of said panel; F

2. In a furnace, the combination with a stoker, of a side wall havin a longitudinal recess substantially paralleling the fuel-supporting surface of said stoker, a cooling system including aseries of pipes extending longitudinally through the recess, a set of refrac tory heat-conducting blocks adapted in predetermined assembly to neatly close the recess to form a panel flush with said side wall and constituting an abutment for the fuel bed, each of said blocks having at the back a recess neatly fitting the respective pipes, upright clamping bar-s bearing against the rear of said pipes, bolts securing said blocks to said clamping bars, and anchor bolts anchoring said bars to the side wall to prevent outward movement of the panel.

3. A furnace wall structure comprising a main wall portion and a refractory inner liner therefor, said liner beinginterrupted in part to provide a recess for installation of a bank of pipes constitutinga part of a cooling systom, pipes installed'within said recess, a; member positioned 'in said recess rearwardly of the pipes, means foranchoring said member in the main wall, a plurality of blocks arranged to close said recess and toprovide with said liner a continuous inner wall surface, said blocks engaging said pipes, and means associated with said anchored member for clamping the said blocks to the pipes.

4. In a furnace, the combination with an underfeed stoker comprising a plurality of inclined retorts, of aside wall having a longitudinal recess substantially paralleling said retorts, a cooling system including a series of pipes extending longitudinally through said recess, a series of heat-conducting blocks adapted in predetermined assembly to neatly close the recess and forming a panel constituting an abutment for the fuel-bed, and means for maintaining said blocks and pipes in heat-conductive relation.

t l 5. In a furnace, the combination with an m underfeed stoker comprising a plurality of inclined retorts, of a side wall having a longitudinal recess substantially paralleling said retorts, a cooling system including a series of pipes extending longitudinally through said recess, a series of heat-conducting blocks adapted in predetermined assembly" to neatly close the recess and forming a panel constituting an abutment for the fuel-bed, means for clamping said blocks in intimate contact with the pipes, and means for maintaining .said panel in alignment with thewalll 6. In a furnace, an underfeed stoker comprising a plurality of inclined retorts, and

means for feeding fuel longitudinally in said retorts, of a wall adjoining a side of one of said retorts and comprising a plurality of blocks of heat-conducting material arranged in said wall to form a narrow panel substantially paralleling the retorts and constituting an abutment for the fuel-bed, a series of pipes installed in said wall and constituting a part of a cooling system, and means for maintaining contact between said heat-conducting blocks and said pipes.

7. In a furnace, an underfeed stoker comprising a plurality of inclined retorts, and means for feeding fuel longitudinally in said retorts, of a wall adjoining a side of one of said retorts and comprising a plurality of blocks'of heat-conducting material arranged in said wall to form a narrow panel substantially paralleling the retorts and constituting an abutment for the fuel-bed, a series of pipes installed in said wall and constituting a part of a cooling system, means for maintaining contact between said hcat-conducting'blocks and said pipes, and means for anchoring said pipes intermediate the ends of the panel to maintain alignment thereof in the wall.

-8. In a furnace, a wall having a longitudinal recess therein, a cooling system provided in said recess including a series of pipes extending longitudinally through said recess, a series of heat-conducting blocks adapted in predetermined assembly to close said recess and form a continuous wall surface, and means for securing said blocks and pipes in heat-conductive relation.

9. In a furnace, a Wall having a longitudinal recess, a cooling system including a series of pipes extending longitudinally through said recess, a series of heat-conducting blocks adapted in predetermined assembly to close said recess and forms continuous wall surface, means for clamping said blocks in intimate contact with said pipes and means for maintaining said ipes and blocks in alignment with the wal i JOSEPH S. BENNETT,- 

